JPS5828068Y2 - Sinkholes such as sinks - Google Patents

Description

[Detailed description of the invention] This invention is an improvement to non-combustible sinkholes such as sinks, which are made by integrally joining a metal lower body with a built-in drain trap to the lower end of a plastic upper body that houses a mesh basket for storing residue. Regarding.

In recent years, a non-combustible sinkhole made by joining a metal lower body to the lower end of a plastic upper body has been widely used for drains in general sinks, etc. However, plastic sinkholes have different expansion coefficients due to heat etc. In the conventional structure where the upper body made of metal and the lower body made of metal are simply joined together, the thermal effect of the discarded water causes different expansion and contraction, resulting in peeling and slight cracks at the joint between the two. Gaps were created, and drainage seeped out of the sinkhole due to capillary action in the iron parts, increasing the humidity inside the cabinet and making the floor wet.

In view of these circumstances, the sinkhole of the present invention has a flange part of a metal lower body with a backing installed around it in advance.
By embedding it in the lower edge of the upper body during plastic molding, all of the problems mentioned above were solved.

Hereinafter, the configuration of the sinkhole of the present invention will be described in more detail based on one embodiment. In the figure, 1 indicates the upper body of the plastic sinkhole, with a cap 1' embedded in the upper edge of the sinkhole as necessary; 2 is a lower body made of metal such as stainless steel that is integrally embedded in the lower end of the upper body 1, and a backing 3 made of rubber or the like is preliminarily attached to the peripheral edge of the lower body flange portion 2' that joins with the upper body 1. After being fixed by baking etc.
For example, as shown in FIG. 2, the lower body 2 is placed on the top of a male mold A in a mold, and the female mold opening is fitted on the outside, and a molten plastic material is injected into the mold and hardened. The backing 3 is embedded in the lower edge of the upper body 1 to form an integral shape.

The proposed sinkhole according to the above structure is constructed in such a way that the plastic upper body 1 and the metal lower body 2 are integrated with each other via the backing 3, and therefore both of them are affected by heat such as boiling water that is dumped there. Even if different expansion and contraction are repeated in between,
The elasticity of the backing 3 absorbs the difference in expansion and contraction between the two members, so that no peeling or gaps occur between the two members, and therefore the drainage inside the sinkhole can be reliably prevented from seeping out.

Furthermore, in the sinkhole having the above configuration, a resin foam material 4 such as urethane is sprayed on the surface of the metal lower body, or
Alternatively, it is convenient to prevent dew condensation from occurring on the surface of the lower body (if the trap portion is isolated from the outside air) by applying a dew condensation prevention treatment such as by attaching it.

As mentioned above, according to the proposed sinkhole, even if the trap part is made of metal, not only will no wastewater seep from the joint, but if necessary, dew condensation prevention treatment can be applied to the outer periphery of the metal lower body. This completely eliminates moisture, dirt, and moisture inside the cabinet, making it extremely hygienic and greatly increasing the advantages of this type of non-combustible sinkhole.In addition, the upper and lower bodies can be joined by injection molding Since it can be carried out all at once, it offers many advantages such as ease of mass production.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the center part of the proposed sinkhole with a part cut away, and Fig. 2 is a longitudinal cross-sectional view of the center part of the mold during molding of the proposed sinkhole with the left half of the mold omitted. It is. In addition, in the figure 1... upper body, 2... lower body, 3
······backing.

Claims (1)

[Scope of utility model registration request] In a non-combustible sinkhole such as a sink, which consists of a plastic upper body and a metal lower body whose outer circumference has been treated to prevent condensation as necessary, the periphery of the flange provided at the upper edge of the metal lower body. A sinkhole such as a sink, characterized in that a backing is fixed to the end, and a flange including the backing is buried and fixed in the lower end of the plastic upper body.